CKD BMW = Glorified Proton in quality but prices are quite cheap compared to recond cars. Service history is an added advantage. Autobavaria is willing to service anytime.
BMW UK spec = Very popular. High demand and therefore translate to higher prices despite less accessories than Japan spec (no electric seat, no TV monitor, no DVD NAV). Weakness - rust. Especially, underbody area.
BMW Japan spec = High in the accessories department (two electric seats, TV screen, DVD NAV, sunroof, rear window blind, on board computer). Prices are cheaper than UK spec. Less rust or sometimes no rust at all. Weakness - radio can tune up to certain frequencies (modification required).
Whatever the spec, the car condition speaks for itself. Make sure the chasis number versus production year is correct too.